In a large mixing bowl, combine ground meat, garlic powder, cumin, salt and pepper and mix well. Divide the meat into 8 equal pieces, roll each piece into a ball and press flat with your hands to form patties. Grill on the oiled rack, about 4 minutes.

While the patties are cooking; mash the avocados using the back of the fork, add lime juice and some salt, mix until well blended. In a separate bowl, mix mayonnaise, minced chipotle and adobo juice.

Fill each slider bun with a slice of cheese, a slice of tomato, avocado, patty, chipotle-mayo, and cilantro. Serve immediately.